Abstract
The land cover conditions in Huai He basin in China were investigated using multi seasonal NOAA AVHRR mosaicked images to test the usefulness of satellite remote sensing data for hydrological applications. Eleven or fourteen land cover types were extracted based on the classified results of four seasonal mosaicked images produced from NOAA AVHRR Local Area Coverage data. The seasonal changes of Calibrated Vegetation Index were investigated for three kinds of agricultural land — the main land cover type of the basin. The annual changes of Calibrated Vegetation Index for these land cover types were derived using biweekly Global Vegetation Index, and used to interpolate the change patterns of Calibrated Vegetation Index by the mosaicked images. Finally the geographic distribution of different types of agricultural lands were derived with the annual change patterns of vegetation index. The analysis was done for two years in flooded and non-flooded conditions, and the influence of the flood was investigated using the classification result and change patterns of Calibrated Vegetation Index in the two years.
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